diff --git a/Cargo.lock b/Cargo.lock
index 24d96a6..fc010e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -136,9 +136,9 @@ checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
 
 [[package]]
 name = "num-bigint"
-version = "0.4.8"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c89e69e7e0f03bea5ef08013795c25018e101932225a656383bd384495ecc367"
+checksum = "93e7820bc0a80a0238e650327316f929ba18d5be054b647490a3a6a339f3e7c0"
 dependencies = [
  "num-integer",
  "num-traits",
diff --git a/Cargo.toml b/Cargo.toml
index c7b7833..529c8cb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ categories = ["mathematics", "science"]
 keywords = ["cas", "computer-algebra", "symbolic", "mathematics"]
 
 [workspace.dependencies]
-num-bigint = "0.4"
+num-bigint = "0.5"
 num-integer = "0.1"
 proptest = "1"
 cas-domain = { version = "0.1.0", path = "crates/domain" }